INSTALLATION MANUAL Domestic hot water tank for air to water heat pump system EKHWE50AV EKHWET50AV EKHWE00AV EKHWE00AV EKHWE00AZ EKHWE00AZ
4 5 6 7 x x x 4x x x x EKHWE50~00 EKHWET50 50 50 0 0 00 50 700 D 45 4 44 44 H H4 H 00 H5 00 700 0 0 440 45 55 775 50 400 705 5 500 A 400 A H 0 80 A 5 H H H H4 H5 Ø D 5 0~40 EKHWE 50 00 50 775 80 55 5 545 55 95 80 40 5 545 00 55 85 0 40 7 660 A 6 55 440 9 9 8 0 7 65
EKHWE50AV EKHWE00AV EKHWE00AV EKHWET50AV EKHWE00AZ EKHWE00AZ Domestic hot water tank for air to water heat pump system CONTENTS Page Introduction... General information... Scope of this manual... Model identification... Accessories... Accessories supplied with the domestic hot water tank... Warranty... Installation of the EKHWE domestic hot water tank... Main components... Outlook diagram... Installation guidelines... Installing the domestic hot water tank... Connecting the water circuits... Field wiring... 5 Commissioning...6 Maintenance...7 Troubleshooting...7 General guidelines... 7 General symptoms... 7 Technical specifications...7 Domestic hot water tank specifications... 7 Scope of this manual This installation manual describes the procedures for unpacking, installing and connecting the EKHWE domestic hot water tanks. Model identification EK HWE (T) 50 A V ACCESSORIES Booster heater voltage V = P, 0 V Z = P, 400 V (only for 00 l and 00 l models) Capacity booster heater: kw Series Indication of storage capacity in litres T = wall mounted; otherwise, floor standing Hot Water tank Enamel coated European Kit READ THESE INSTRUCTIONS CAREFULLY BEFORE INSTALLATION. KEEP THIS MANUAL IN A HANDY PLACE FOR FUTURE REFERENCE. IMPROPER INSTALLATION OR ATTACHMENT OF EQUIPMENT OR ACCESSORIES COULD RESULT IN ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE OR OTHER DAMAGE TO THE EQUIPMENT. BE SURE ONLY TO USE ACCESSORIES MADE BY DAIKIN WHICH ARE SPECIFICALLY DESIGNED FOR USE WITH THE EQUIPMENT AND HAVE THEM INSTALLED BY A PROFESSIONAL. IF UNSURE OF INSTALLATION PROCEDURES OR USE, ALWAYS CONTACT YOUR DAIKIN DEALER FOR ADVICE AND INFORMATION. THE UNIT DESCRIBED IN THIS MANUAL IS DESIGNED FOR INDOOR INSTALLATION ONLY AND FOR AMBIENT TEMPERATURES RANGING 0 C~5 C. INTRODUCTION General information Thank you for purchasing this domestic hot water tank. The EKHWE domestic hot water tank with integrated kw electrical booster heater must be connected to the indoor unit. The domestic hot water tank is available in three sizes: 50, 00 and 00 litre. All models are floor mounted, while the 50 litre model EKHWET50AV is wall mounted. The 00 and 00 litre models are also available as 400 V versions. Accessories supplied with the domestic hot water tank See figure Thermistor + connection wire ( m) Contactor - fuse assembly Contactor fixing screw 4 Tapping screw 5 6 -way valve (Rp ") 7 -way valve motor WARRANTY Warranty will not be valid if a pressure relief valve of max. 0 bar is not installed. abnormal corrosion occurred due to not installing dielectric couplings. incorrect electric connections are made. applying electric power to the unit before filling it with water. insufficient maintenance, in particular not inspecting the anode every years and replacing if required. EKHWE50~00AV + EKHWE00+00AZ 4PW496-B
INSTALLATION OF THE EKHWE DOMESTIC HOT WATER TANK Main components The total AD system (indoor unit and outdoor unit) is designed for combination with an AD domestic hot water tank. In case another tank is being used in combination with the AD indoor unit, Daikin cannot guarantee neither good operation nor reliability of the system. For those reasons Daikin cannot give warranty of the system in such case. Domestic hot water quality must be according to EN directive 98/8 EC. A drain device should be installed on the cold water connection on the domestic hot water tank. For safety reasons, it is not allowed to add ethylene glycol to the water circuit. Adding ethylene glycol might lead to contamination of the domestic water if a leakage would occur in the heat exchanger coil. It is important that the storage capacity of the domestic hot water tank meets normal daily fluctuations in consumption of domestic hot water without any fall of the water outlet temperature during use. Take care that in the event of a leak, water cannot cause any damage to the installation space and surroundings. The anode shall be inspected at least every years and, if required, replaced. A pressure relief device of max. 0 bar should be installed on the domestic hot water tank. In case of limited consumption of domestic hot water, e.g. at holiday residences or at houses that are occasionally not occupied, the domestic hot water tank installation must be fitted with a shunt pump. The shunt pump can be time-controlled, the shunt pump must operate to circulate the complete volume of the domestic hot water tank.5 times per hour, and the shunt pump must operate, or be programmed for operation, during uninterrupted hours per day at least. 4 Cold water connection Hot water connection Shunt pump (field supply) 4 Non-return valve (field supply) In case of very long field water piping between the domestic hot water tank and the hot water end point (shower, bath, etc.) it can take more time before the hot water from the domestic hot water tank reaches the hot water end point. 4 A 5 6 7 8 9 0 Anode Hot water connection (/4" MBSP) (a) Pressure relief valve connection (/" MBSP) (a) 4 Electrical box 5 Recirculation hole (/4" MBSP) (a) 6 Thermistor socket 7 Heat exchanger inlet (/4" FBSP) (b) 8 Heat exchanger coil 9 Heat exchanger outlet (/4" FBSP) (b) 0 Cold water connection (/4" MBSP) (a) Thermistor hole for use with solar kit option. Refer to the EKSOLHWAV. Electric heater element Inspection flange 4 Thermal cut out 5 Cable entry from indoor unit 6 Cable entry for use with optional solar kit (a) MBSP = Male British Standard Pipe (b) FBSP = Female British Standard Pipe 4 4 5 6 A Shower Recirculation pump If required connect a recirculation pump in between the hot water end point and the recirculation hole in the domestic hot water tank. EKHWE50~00AV + EKHWE00+00AZ 4PW496-B
Safety devices The domestic hot water tank relief valve connections may not be used for other purpose. Do not install heaters without thermal cut-outs. Thermal protector The booster heater in the domestic hot water tank is equipped with a thermal protector. The thermal protector is activated when the temperature becomes too high. When activated, the protector has to be reset on the domestic hot water tank by pressing the red button (for access, remove the electrical box cover). The electrical box lid must only be opened by a licensed electrician. Switch off the power supply before opening the electrical box lid. Pressure relief valve A pressure relief valve (field supply) in accordance with relevant local and national regulations, and with an opening pressure of maximum 0 bar must be connected to the pressure relief valve connection. Water may drip from the discharge of the pressure relief valve device. Connecting the water circuits Refer to the chapter "Typical application examples" described in the installation manual delivered with the indoor unit for details on connecting the water circuits and the motorised -way valve. Make sure to insulate all water pipes and connections. Connecting the -way valve Refer to figure before making the connection. Installation position. It is advised to connect the -way valve as close as possible to the indoor unit. It can be installed according the following four configurations. Outlook diagram Outlook diagram, see figure. figure A figure B Installation guidelines Keep in mind the following guidelines when installing the domestic hot water tank: The installation location is frost-free. Take care that in the event of a leak, water cannot cause any damage to the installation space and surroundings. Make sure to make the piping in size " or more (and reduce to /4" at the inlet of the tank) as to have sufficient water volume in the piping between indoor unit and domestic hot water tank. Locate the domestic hot water tank in a suitable position to facilitate ease of maintenance; remember access is required to the electrical box. Refer to the grey-coloured zones indicated in figure. Provide a connection for the pressure relief valve blow-off and drain. To avoid back siphonage it is advised to install a non-return valve on the water inlet of the domestic hot water tank in accordance with local and national regulations. figure C From AD indoor unit To domestic hot water tank To room heating figure D Installing the domestic hot water tank Check if all domestic hot water tank accessories (see "Accessories" on page ) are enclosed. When floor mounting, place the domestic hot water tank on a level surface. If required, adjust the legs at the bottom. When wall mounting (only for EKHWET50AV model), make sure the wall is sturdy. In both cases, make sure the domestic hot water tank is mounted level. Make sure to respect the service space as indicated in figure. EKHWE50~00AV + EKHWE00+00AZ 4PW496-B
Unpack the -way valve body and -way valve motor. Verify that following accessories are provided with the motor. 6 Fit screw (see step ) in the lower right hand corner of the valve cover plate. 5 4 7 6 figure A and figure B Sleeve Screw Central screw 4 Red/blue scale 5 Cover 6 Indication plate 7 Valve motor cover figure C and figure D 7 Push the motor on the motor sleeve. Make sure not to rotate the sleeve during this action, as to maintain the valve position as set during step 4. 8 Put the red/blue scale on the valve as shown below. 4 Install the -way valve body in the pipework. Make sure the shaft will be positioned in such a way that the motor can be mounted and replaced. When installing the valve according to figure C or figure D, remove the indication plate and turn it upside down, making sure the scale "0 to 0" is located on the lower left bottom of the valve. Put the sleeve on the valve and turn the valve to the middle position (marked as "5") of the scale plate. Check that the valve is positioned as in the figure below. It should be blocking the outlet connection to the domestic hot water for 50% and the outlet connection to the room heating also for 50%. figure A and figure D figure B and figure C The red arrow will point to the red zone when the valve is in domestic water heating mode and will point to the blue zone when the valve is in room heating mode. 9 Make the wiring in the indoor unit according to following figure: 8 9 0 -way valve BLK BLU BRN figure A and figure B figure C and figure D If the valve is not positioned in this way before mounting the motor, the valve will give way to both domestic water and room heating during operation. 5 When installing according to figure B or figure C, open the valve motor cover by loosening the 4 screws and change the jumper as to change the rotation direction of the valve. By default the jumper is factory set to apply for installation according to figure A and figure D. figure A and figure D figure B and figure C Refer also to the drawing on page 6. Connecting the water circuits Connect the water inlet and water outlet from the heat exchanger. Connect the hot and cold water supply tubes. Make sure to use galvanic couplings for the connection. Connect the pressure relief valve (field supply, opening pressure maximum 0 bar). If a discharge pipe is connected to the pressure relief device it must be installed in a continuously downward direction and in a frost-free environment. It must be left open to the atmosphere. 4 EKHWE50~00AV + EKHWE00+00AZ 4PW496-B
Field wiring A main switch or other means for disconnection, having a contact separation in all poles, must be incorporated in the fixed wiring in accordance with relevant local and national legislation. All field wiring and components must be installed by a licensed electrician and must comply with relevant European and national regulations. The field wiring must be carried out in accordance with the wiring diagram supplied with the unit and the instructions given below. The domestic hot water tank must be earthed via the indoor unit. Procedure Switch off the power supply before making any connections. Connections to be made in the domestic hot water tank electrical box Make sure the power supply cable is insulated from the surface of the inspection hole or can resist temperatures to 90 C. For the EKHWE*V model, connect the booster heater power supply and thermal protection cable as shown in the wiring diagram below. Power circuit and cable requirements Be sure to use a dedicated power circuit. Never use a power circuit shared by another appliance. Use one and same dedicated power supply for the outdoor unit, indoor unit, backup heater and domestic hot water tank. For cable requirements and specifications, refer to "Field wiring" in the indoor unit installation manual supplied with the EKHBH/X unit. X0M 9 0 P P 4 X9M NOTE Select the power cable in accordance with relevant local and national regulations. Thermistor and thermistor cable Insert the thermistor as deep as possible in the thermistor socket. Fix using the spring provided. The distance between the thermistor cable and power supply cable must always be at least 5 cm to prevent electromagnetic interference on the thermistor cable. 4 XM EKHB 9 0 9 0 P EKSOLHW YLW/GRN BLU BRN X4M EKHB YLW Yellow BRN Brown GRN Green BLU Blue Can become hot 4 4 XM EKHWE50~00AV + EKHWE00+00AZ 4PW496-B 5
For the Z models, connect as follows: Note: only relevant field wiring is shown. X0M 9 0 P P 4 X9M TR KM KM K5M TR KM KM K5M X9A AP KM XA K7M M YLW/GRN BLU BRN AP K4M FB FB XM EKHB 4 9 0 P 9 0 X4M 4 XM EKSOLHW EKHB YLW Yellow BRN Brown A4P K6M XM GRN Green BLU Blue Can become hot X4M X4M 4 4a 5 6 7 8 9 0 4 5 5a 6 7 8 9 0 QL thermostat -way valve -way valve thermal SOLAR PUMP fuse OPTIONAL XM Make sure to ensure strain relief of the cable. Connections to be made in the indoor unit switch box Mount the prewired contactor (KM), circuit breaker (FB) and terminal blocks (XM, X4M). The contactor must be fixed with the supplied contactor screws and the terminal blocks must be fixed with the x supplied tapping screws. 4 Plug the connector connected to the contactor KM in the socket XA on the PCB. >50 mm XM L L L N XM (0V) L L L N XM 5 Plug the thermistor cable connector in the socket X9A on the PCB. 6 Connect the prewired earth wires of the terminal block XM and X4M to the earthing screw. 7 Connect the booster heater power supply and thermal protection cable (field supply) to terminal X4M earth,,, and XM, 4. 8 Connect the booster heater power supply cable to the terminal block XM. 9 Fix the cables to the cable tie mountings with cable ties to ensure strain relief. 0 Set DIP switch SS- on the PCB to ON. When routing out cables, make sure that these do not obstruct mounting of the indoor unit cover. V L N 0 V AC kw Z L L 400 V AC kw COMMISSIONING X4M 4 XM Before putting power to the unit, make sure: the unit is filled with water, the sensor of the thermistor cable is mounted correctly in the thermistor socket, a pressure relief valve is installed. Check the operation of the -way valve: make sure that when the indoor unit is in domestic water mode it sends hot water to the tank; when it is in room heating mode, it sends water to the room (feel the tubes by hand). BLK BLU BRN way valve 6 EKHWE50~00AV + EKHWE00+00AZ 4PW496-B
MAINTENANCE In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and the field wiring have to be carried out at regular intervals. Before carrying out any maintenance or repair activity, always switch off the circuit breaker on the supply panel, remove the fuses or open the protection devices of the unit. Make sure that before starting any maintenance or repair activity, also the power supply to the outdoor unit is switched off. The pressure relief device valve is to be operated regularly as to remove lime deposits and to verify that it is not blocked. Once a year: Descaling Depending on the water and set temperature, scale will deposit on the heat exchanger and booster heater inside the domestic hot water tank. This will restrict heat transfer and can cause burn out of the booster heater. For this reason, descale the booster heater and the heat exchanger. Do not use sharp metal tools or strong acid to remove the scaling. Only use commercially available cleaning and scale removal agents for copper and enamelled surfaces. After removing the scale, rinse the domestic hot water tank by water jet. Once every year: Anode. Check if the anode is not deteriorated. If the diameter of the anode has decreased with 0 mm or more, make sure to replace it (original diameter is mm). It is of the utmost importance that the anode is in good contact with the domestic hot water tank. For this reason, after replacing the anode or other servicing, make sure that the anode is connected with the earthing screw. TROUBLESHOOTING This section provides useful information for diagnosing and correcting certain troubles which may occur in the unit. General guidelines Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring. Before contacting your local dealer, read this chapter carefully, it will save you time and money. When carrying out an inspection on the supply panel or on the switch box of the unit, always make sure that the circuit breaker of the unit is switched off. When a safety device was activated, stop the unit and find out why the safety device was activated before resetting it. Under no circumstances safety devices may be bridged or changed to a value other than the factory setting. If the cause of the problem cannot be found, call your local dealer General symptoms Symptom : No water flow from hot taps POSSIBLE CAUSES The main water supply is off. Symptom : Water from hot taps is cold POSSIBLE CAUSES The thermal cut-out(s) has/have operated CORRECTIVE ACTION Check that all shut off valves of the water circuit are completely open. CORRECTIVE ACTION Check and reset button(s). Put the thermostat setting for domestic hot water on the indoor unit to 75 C. Check if thermistor is correctly installed in thermistor socket. The indoor unit (EKHBH/X) is not operating. Check the indoor unit (EKHBH/X) operation. Refer to the manual delivered with the indoor unit. If any faults are suspected, contact your local dealer. TECHNICAL SPECIFICATIONS Domestic hot water tank specifications EKHWE50AV EKHWET50AV EKHWE00AV EKHWE00AZ EKHWE00AV EKHWE00AZ Volume 50 l 50 l 00 l 00 l 00 l 00 l Internal heat exchanger volume l l l l l l Overall dimensions (Ø x H) 545 x 50 mm 545 x 50 mm 545 x 55 mm 545 x 55 mm 660 x 55 mm 660 x 55 mm Booster heater, power supply 0 V 50 Hz P 0 V 50 Hz P 0 V 50 Hz P 400 V 50 Hz P 0 V 50 Hz P 400 V 50 Hz P Booster heater, running current A A A 7.5 A A 7.5 A Booster heater, capacity kw kw kw kw kw kw Connections Refer to "Main components" on page Weight (empty) 80 kg 8 kg 04 kg 04 kg 40 kg 40 kg Mounting Floor Wall Floor Floor Floor Floor Maximum pressure 0 bar 0 bar 0 bar 0 bar 0 bar 0 bar Maximum domestic hot water temperature 75 C 75 C 75 C 75 C 75 C 75 C Maximum temperature through heat exchanger 0 C 0 C 0 C 0 C 0 C 0 C EKHWE50~00AV + EKHWE00+00AZ 4PW496-B 7
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